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Cloud [144]
3 years ago
7

Some protozoans have special organelles called contractile vacuoles that continually eliminate excess water from the cell. The p

resence of these organelles tells you that the environment is what to the protozoan?
Biology
1 answer:
Ann [662]3 years ago
6 0

Answer:

Liquid and with a higher osmotic pressure

Explanation:

Remember that a cell that is surrounded by an environment with a higher osmotic pressure, will produce that the cell get some water outside to make some dilution to the salt concentration that surrounds the protozoan.

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Darwin realized that the often exquisite fit of species to their environment is primarily the result of
bagirrra123 [75]
Natural Selection.
An easy and important way to remember this is by thinking of a species - let’s say a bright white moth. For ages, these moths have survived beautifully, matching perfectly with the white tree bark they live on, until one day, a smoky building begins pumping its soot into the air. This air begins to change the color of the tree bark to black and the once hidden white moths are now plainly visible to birds who eat them easily. Fortunately, every now and then a moth is born who is darker than the rest - black as soot even. And so, the birds keep eating the white moths but missing the soot-colored ones. As time goes by, the soot-colored moths produce more and more similarly colored moths, who are well hidden from the birds AND after enough time, the only moths that remain are soot-colored. This is why so many species “fit” exquisitely into their environment. They have ALL adapted in some way similar to the soot-colored moth.
6 0
3 years ago
When you were testing the ciliospinal reflex and only stimulated the left side of the subject, was the response reflex contralat
natulia [17]

Options: A. contralateral

B. ipsilateral

C. both

Answer:B. ipsilateral

Explanation:The ciliospinal reflex which is also known bas pupillary-skin reflex is usually made uo of the dilation of the ipsilateral pupil this dilation is in response to pain applied to the neck, face, and upper trunk.

If you stimulate the left side of the subject, the response will be only in the ipsilateral which means the stimulation will be felt in the same side of the subject which in this case is the Left side if the subject.

5 0
3 years ago
The term ________ exercise describes any type of exercise typically performed at moderate levels of intensity for extended perio
max2010maxim [7]
The term aerobic exercise describes any type of exercise typically performed at moderate levels of intensity for extended periods of time that increases the heart rate. In such exercise, oxygen is used to "burn" fats and glucose in order to produce energy in the form of ATP, the basic energy carrier for all cells. Initially, glycogen is broken down to produce glucose, but in its absence, fat metabolism is initiated instead. Aerobic exercise is an exercise performed at a moderately high level of intensity over a long period of time. For example, running a long distance at a moderate pace. 
4 0
3 years ago
What process favors survival of specific individuals within a population based on inherited characteristics
LiRa [457]

Answer:

According to Charles Darwin's theory of evolution by natural selection, organisms that possess heritable traits that enable them to better adapt to their environment compared with other members of their species will be more likely to survive, reproduce, and pass more of their genes on to the next generation.

Explanation:

I hope this helps! :D

7 0
2 years ago
2. What do mechanical waves require to be able to travel?
Simora [160]

Answer:

<h2>Mechanical waves require material medium to be able to travel .</h2>
4 0
3 years ago
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